CVE-2015-6526

kernel: perf on ppc64 can loop forever getting userlevel stacktraces

Severity Score

4.9

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The perf_callchain_user_64 function in arch/powerpc/perf/callchain.c in the Linux kernel before 4.0.2 on ppc64 platforms allows local users to cause a denial of service (infinite loop) via a deep 64-bit userspace backtrace.

Vulnerabilidad en la función perf_callchain_user_64 en arch/powerpc/perf/callchain.c en el kernel de Linux en versiones anteriores a 4.0.2 sobre plataformas ppc64, permite a usuarios locales causar una denegación de servicio (bucle infinito) a través de una traza inversa profunda en el espacio de usuario de 64-bit.

A flaw was found in the way the Linux kernel's perf subsystem retrieved userlevel stack traces on PowerPC systems. A local, unprivileged user could use this flaw to cause a denial of service on the system by creating a special stack layout that would force the perf_callchain_user_64() function into an infinite loop.

*Credits: N/A

CVSS Scores

NISTv2 4.9

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-08-20 CVE Reserved
2015-08-31 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-399: Resource Management Errors
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (11)

URL	Tag	Source
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a5cbce421a283e6aea3c4007f141735bf9da8c3	X_refsource_confirm
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.2	X_refsource_confirm
http://www.openwall.com/lists/oss-security/2015/08/18/4	Mailing List
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html	X_refsource_confirm
http://www.securityfocus.com/bid/76401	Vdb Entry
http://www.securitytracker.com/id/1033728	Vdb Entry
https://github.com/torvalds/linux/commit/9a5cbce421a283e6aea3c4007f141735bf9da8c3	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.ubuntu.com/usn/USN-2759-1	2016-12-08
http://www.ubuntu.com/usn/USN-2760-1	2016-12-08
https://bugzilla.redhat.com/show_bug.cgi?id=1218454	2015-11-19
https://access.redhat.com/security/cve/CVE-2015-6526	2015-11-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.0.1 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.0.1"		-		Affected